Practice Quiz

MCAT Biology - Question List

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21. Which of the following statements describes the role of ATP in animal cells?
  1. ATP stores and releases energy.
  2. ATP forms the channels in the plasma membrane.
  3. ATP serves as the hereditary material in the nucleus.
  4. ATP attaches to and digests unneeded organic molecules.
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22. The bones that make up the forelimbs of monkeys, cats, whales, and birds are similar. Which of the following statements best supports the evolutionary relationship of these animals?
  1. The animals have different ancestries but have adapted to
    similar environments.
  2. The animals share a common ancestry but have adapted to
    different environments.
  3. The animals at one time lived in different environments but now share
    an environment.
  4. The animals use their forelimbs for identical activities but live in different environments.
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23. Scientists have found geysers on one of Saturn’s moons. The geysers release water vapor containing complex organic compounds, which may indicate the presence of life. Which of the following elements is most likely abundant in the organic compounds in the water vapor?
  1. carbon
  2. chlorine
  3. iron
  4. zinc
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24. The willow flycatcher is a bird species with a summer range throughout much of the United States. Which of the following would directly decrease the size of a willow flycatcher population in a given year?
  1. the disappearance of a species that preys on willow flycatchers
  2. the arrival of migrating willow flycatchers from populations in
    other areas
  3. the emigration of male willow flycatchers that did not secure
    territories
  4. the hatching of a larger percentage of eggs in the willow flycatcher population
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25. In pure water, a red blood cell from an animal will swell and burst, but a leaf cell from a plant will not. Which structure in the leaf cell is responsible for this difference?
  1. cell membrane
  2. cell wall
  3. mitochondrion
  4. nucleus
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